Glue and process for manufacturing the same



" UNITED STATES PATENT OFFICE.

SHERBURNE B.'HENNING, OF RHINELANDER, WISCONSIN, ASSIGNOR TO THE UNITED STATES OF AMERICA.

GLUE AND PROCESS FOR MANUFACTURING THE SAME.

No Drawing.

To all whom it may concern:

Be it known that I, SHERBURNE B. HEN- NING, a citizen of the United States, residing at Rhinelander, in the county of Oneida and State of Wisconsin, have invented a new Glue and Processes for Manufacturing the Same, of which the following is a specifica- I type and to disclose an improved process vided and comes into more intimate contactstrength.

for making this glue.

In preparing my glue I place in a suit-v able mixture 100 parts by weight of black soluble blood albumin. To this I add between 125 and 190 .parts by weight of water, not however, adding all the water at once but keeping out a.small proportion of the Water to be mixed with the lime used as will be hereinafter stated. The temperature of the blood albumin and the water should be approximately 80 degrees Fahrenheit. After this mixture has soaked for approximately one hour, it is stirred slowly at first and then more rapidly. I then add," by stirring in, two to six parts by weight of ammonium hydroxid of a specific gravity of 0.90. I then mix with from one to three parts by weight of lime, the water kept out of the quantity mixed with .the blood albumin in order to produce a milk of lime. This milk of lime is thoroughly mixed in and the en tire mixture is stirred half an hour, for use.

Soaking the blood albumin in water at the beginning of the process causes part of the albumin to dissolve in the water and softens the remainder. The addition of the ammonium hydroxid, however, dissolves much more of the albumin and leaves only a small partof the albumin undissolved. In this way, the albumin is much more finely diafter which the glue is ready with the lime. The more intimate this contact, the greater the strength of the glue and accordingly the addition of ammonium hydroxid produces a glue of greatly increased The addition of the ammonium hydroxid also retards the coagulation of the glue on standing and, accordingly, the glue may be Specification of Letters Patent.

for approximately Patented Feb. 3, 1920.

- Application filed April 22, 1919. Serial No. 291,973.

used over a longer period after mixing. Further, the ammonium hydroxid reduces the surface tension of the liquid glue and thus facilitates-penetration by the glue into the wood or other material to be glued.

I have found by experiment that, while lime adds strength to an albumin glue, there is a fdefinite point after which the increase in the amount of lime will decrease the strength of the glue rather than increase it. I have found that this optimum amount of lime is three per cent. by. weight of the amount of albumin.

' It is well known that suflicient water is required to dissolve and carry the albumin.

Itis also well known that the stren h of. v

and a consequent wea ening of the glue.-

For that reason I maintain the temperature of the mixture well below the coagulating temperature and in fact-maintain it below 85 degrees Fahrenheit.

In these several ways, I have .improved the existing albumin glues. I have set forth the exact process and proportions preferred by me at present, but I realize that changes may be made and so far as these changes fall within the scope of the appended claims, I deem them to be includedin my invention. I also realize that other chemical materials may be substituted for one or more of these employed by me and in so far as such substitutions are obvious, I deem them included in my invention. V V

This application is a continuation in part of an application filed April 1, 1918, Serial No. 226,129. p v

What I claim is: v r

1. A glue comprising-blood albumin, ammonium hydroxid, lime and water.

2. A glue comprising by weight substantially 1 part of blood albumin, .02 to .06 parts of ammonium hydroxid, lime and water.

hydroxid, .01 to .03 parts of lime and water.

4. A glue comprising by weight substantially 1 part of blood albumin, ammonium hydroxid, lime and 1% parts of water.

5. A glue comprising by weight substantially 1 part ofblood albumin, .02 to .06 parts of ammonium hydroxid, .01 to .03 parts of lime and water.

6. The process of making an albumin glue which comprises mixing blood albumin, lime, ammonium hydroxidand water at a temperature below the coagulating temperature of blood albumin.

7. The process of making an albumin glue which comprises soaking blood albumin in water, adding ammonium hydroxid and then adding lime.

8. The process of making an albumin glue which comprises'soaking blood albumin in water, thoroughly mixing in ammonium hydroxid, and thoroughly mixing in lime.

9. The process of making albumin glue which comprises soaking 1 part of blood albumin by weight in approximately 1% parts of water, thoroughly mixing in .04: parts ammonium hydroxid and thoroughly mixing in .02 parts of lime.

' 10. The process of making an albumin glue which comprises soaking 1 part of blood albumin in water, mixing in approximately .04 parts ammonium hydroxid, and mixing in .02 parts lime.

In testimony whereof I aflix hereunto my signature.

SHERBURNE B. HENNING. 

